Rancho Cucamonga mother pleads not guilty to trying to kill daughter

The mother who allegedly tried to kill her daughter in Montclair on Halloween pleaded not guilty to the charges Tuesday.

Stephanie Aguilar, 31, of Rancho Cucamonga was present and in custody at the West Valley Superior Court for her arraignment.

The judge also went over her seven felony charges, which include attempted murder, 2 counts of assault with a deadly weapon, willful cruelty to a child causing injury, inflicting injury on a child, assault by means of force likely to produce great bodily injury, and resisting an officer, according to court records.

Montclair police said Aguilar and her daughter were traveling Wednesday when the mother allegedly slammed the vehicle into the back of a tractor-trailer on the westbound 10 Freeway near Mills Avenue.

Witnesses said Aguilar then attacking the injured 8-year-old by punching her and slamming the girl's head into the center console, authorities said.